摘要
建立了考虑缸套振动的活塞动力学和混合润滑耦合模型,并使用Broyden算法对缸套振动特性进行求解。在综合考虑活塞裙部及缸套的表面粗糙度、弹性变形、接触等因素对活塞裙部润滑性能影响的基础上,使用Broyden算法求解缸套振动特性,并研究缸套振动对活塞2阶运动、活塞裙部润滑性能的影响。结果表明:做功冲程缸套的振动位移以及加速度最大,且随着转速的增加,位移响应幅值增大;与不计缸套振动相比,计入缸套振动的活塞2阶运动速度出现剧烈振荡,局部油膜压力幅值以及最小油膜厚度会明显波动,平均摩擦功耗增加。
A coupling model for dynamic and tribological performances for a piston was established,in which the effects of surface roughness,bulk elastic deformation and contact between the piston skirt and cylinder were considered.Based on this model,the cylinder vibration was solved with the Broyden algorithm,whose effects on the secondary motion and lubrication performances of the piston were analyzed.Numerical results showed that the maximum vibration displacement and acceleration of the cylinder occur in the power stroke.With the increase of the rotational speed of the engine,the maximum cylinder displacement increases.If the cylinder vibration is considered,the secondary velocities of the piston,the amplitude of the local film pressure and minimum film thickness fluctuate and the averaged friction power loss increases,compared with the corresponding values without the cylinder vibration.
出处
《四川大学学报（工程科学版）》
EI
CAS
CSCD
北大核心
2014年第4期167-175,共9页
Journal of Sichuan University (Engineering Science Edition)
基金
教育部留学回国人员启动基金资助项目([2011]1568号)
重庆市教委资助项目(KJ08A11)
关键词
缸套振动
润滑性能
2阶运动
活塞裙
BROYDEN算法
secondary motion
iubrication performances
cylinder vibration
piston skirt
Broyden algorithm
